Consider the following schedule of three transactions: r2(y) r1(x) r3(y) r2(x) w2(y) w1(x) r3(x)
a. Define a serialization between T1 and T2.
b. In what apparent order does T3 see the database?
c. Is the schedule serializable?
d. Assuming that each transaction is consistent, does the final database state satisfy
all integrity constraints?
e. Does the database state seen by T3 satisfy all integrity constraints? Explain.
a. T2, T1
b. T1, T2
c. No
d. yes.
e. Yes. T3 is a read-only transaction. The read/write transactions, T1 and T2, are
serializable and hence the final database satisfies all integrity constraints.
You might also like to view...
To avoid duplicating code, use ________, rather than ________.
a. inheritance, the “copy-and-past” approach. b. the “copy-and-paste” approach, inheritance. c. a class that explicitly extends Object, a class that does not extend Object. d. a class that does not extend Object, a class that explicitly extends Object.
In SharePoint, the Paragraph group Indent and Outdent list formats are the most commonly used types of lists
Indicate whether the statement is true or false
A ________ can create a new document based on a preformatted document.
Fill in the blank(s) with the appropriate word(s).
Solve the system using a graphing calculator.
A.
B.
C.
D. Infinite number of solutions
E. No solution